I feel like people are a little too quick to say that we ‘know’ Vanitas is one of the original thirteen darknesses. What we know is that Xehanort suspects that Vanitas is a true darkness (as well as some potential, but not necessarily conclusive, supporting evidence).
Remember when we “”knew”” that there can’t be two Keyblade Masters?
I’m just saying, Kingdom Hearts, as a series, has historically been very careful about keeping what the characters think, know, and express very separate from what is actually true.
It’s easily the most probable interpretation of the evidence we have, but it’s not a true thing that we know yet.











